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An Entity-relationship diagram is a tool to represent

  1. Data model
  2. Process model
  3. Event model
  4. Customer model

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Answer :A

An entity-relationship diagram (ERD) is a graphical representation of an information system that shows the relationship between people, objects, places, concepts or events within that system. An ERD is a data modeling technique that can help define business processes and can be used as the foundation for a relational database.

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An entity-relationship diagram helps us to visualize data and the relationship between entity sets so that we can produce a well-designed database.

So we can say, Entity-relationship is a tool to represent the data model.

Option A

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